<template>
  <div ref="main" style="width:600px;height:360px;margin-bottom:10px" />
</template>

<script>
import * as echarts from 'echarts/core'
import {
  DatasetComponent,
  TooltipComponent,
  GridComponent,
  LegendComponent
} from 'echarts/components'
import { BarChart } from 'echarts/charts'
import { CanvasRenderer } from 'echarts/renderers'

echarts.use([
  DatasetComponent,
  TooltipComponent,
  GridComponent,
  LegendComponent,
  BarChart,
  CanvasRenderer
])
export default {
  mounted() {
    const chartDom = this.$refs.main
    const myChart = echarts.init(chartDom)
    let option = {}
    option = {
      title: {
        text: '各地区年度销售情况'
      },
      legend: {},
      tooltip: {},
      dataset: {
        dimensions: ['product', '2015', '2016', '2017'],
        source: [
          { product: '北京', 2015: 43.3, 2016: 85.8, 2017: 93.7 },
          { product: '上海', 2015: 83.1, 2016: 73.4, 2017: 55.1 },
          { product: '广州', 2015: 86.4, 2016: 65.2, 2017: 82.5 },
          { product: '深圳', 2015: 72.4, 2016: 53.9, 2017: 39.1 }
        ]
      },
      xAxis: { type: 'category' },
      yAxis: {},
      // Declare several bar series, each will be mapped
      // to a column of dataset.source by default.
      series: [{ type: 'bar' }, { type: 'bar' }, { type: 'bar' }]
    }
    option && myChart.setOption(option)
  }
}
</script>

<style>
</style>
